rest of the world (Project A119). In 1959, a feasibility study of a possible military base on the Moon (Project Horizon) was conducted. In 1958, a plan for a 21-airman underground Air Force base on the Moon by 1968 was developed (Lunex Project).

The Safeguard Program was deployed in the mid-1970s and was based on the Sentinel Program. Since the ABM treaty only allowed for the